Immunogenicity and Safety of Havrix™ Co-Administered With a Diphtheria, Tetanus and Pertussis and a Haemophilus b Vaccine in Children Aged 15 Months

An open, controlled comparison of Havrix™ administered alone or with Infanrix™ and ActHIB. The three groups evaluated are: 1) Havrix™ alone, 2) Havrix™ + Infanrix™ and ActHIB and 3) Infanrix™ and ActHIB followed by Havrix™ one month later.